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The outlook is bleak in the U.S. and complicated in other countries.
Advanced materials and smart design could lower turbine blade costs by 40 percent.
The technology could make it cheaper to use wind and solar power and to switch to natural gas from coal.
Sixty-six new energy research projects were announced on Wednesday. Here are some interesting ones.
New technology, including better control algorithms and communications, is improving the performance of wind turbines.
It could make it easier to integrate renewables and reduce fuel consumption in off-grid applications.
Economist Ricardo Hausmann says the U.S. has a chance to invent the manufacturing technology of tomorrow.
As the solar market has changed, companies hoping to compete with low manufacturing costs have been forced to rethink.
Interactions between hundreds of wind turbines make power output difficult to predict.
Without a radically expanded and smarter electrical grid, wind and solar will remain niche power sources.